Compound of the anthracene series and process of making same.



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FILIP RACER, OF MANNHEIH, GERMANY, ASSIGNOE T0 BADISCHE ANILIN & SODA FABRIK, 01E

LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, A CEDRPORATION. I

COMPOUND OF THE ANTHRACENE SERIES AND PEGGESS OF MAKING- SAME.-

pounds termed Q-methyl-anthrapyridon compounds of which the simplest member has a composition corresponding to the formula I have found that 2-methyl-anthrapyridon compounds which contain halogen in position 4 canbe made to react with aromatic amins of the benzene and naphthalene series and to yield 4 arylamino-2-methyl-anthrapy-' ridon compounds. I have also found that anthrapyridon compounds which contain a halogen, or other, oup, instead of the methyl group, in position 2, and which also I contain halogen in position 4, will also react with aromatic amins of the benzene and naphthalene series and yield t-arjl-amino anthrapyridon compounds. The reaction can, if found desirable, be carried out in the presence of sodium acetate, or of other c0mpound which will assist in the. reaction.

The aryl-amino-anthra-pyridon compounds obtained as hereinbefore described can, by treatment with sulfonating agents, be converted into coloring matters which dye wool Speeification of Letters Patent.

Application filed March 24, 1908. Serial No. $233M.

Patented Aug. 24, 1909.

' trate further the nature of my invention and how it can be carried into practical efiect,

amples. The partsare by weight.

Example 1: Boil together, in a reflux apparatus, for from four t), to five hours, eight (8) parts of paratoluidin, one (1) part. of l-chlor-Q-methyl-anthrapyridon and one (1) part of anhydrous sodium acetate, and then add eight 8) parts of alcohol. When the mass has become cold, filter off the product .and wash it with alcohol and water and then dry it, whereupon l-paratoluido- 2-methyl-anthrapyridon is obtained in the form of red-brown crystals. In'order to part thereof in ten- (10) parts of sulfuric acid monohydrate,.and heat at a temperature of from forty (40), to lifty do that the mass has become completely soluble in water. Then pour the mixture, while stirring, into one hundred (100) parts of water, and filter oif the coloring matter and Wash it with a solution of common salt. It can either be dried, or be used directly in the forn'rof paste.

Example 2: Boil together, in a reflux apparatus, eight (8) parts of paratoluidin, one part (1) part of 2.4c-dichlor-anthrapyridon and one (1) part of anhydrous sodium acetate. When the reaction is complete, add twelve (12) parts of alcohol. Work up the product and convert it into its sulfonic acid as described in the foregoing Example 1. A similar. procedure can be employed when other aromatic amins of the benzene, or naphthalene, series are used.

Now what I claim is:

1. The process of producing compounds of the anthracene series by condensing with an aromatic amin of the benzene, or naphthalene, series a -halogenated anthrapyridon compound which is substituted in. position 2.- I

2. The process of producing coloring matters of the anthracene series by condensing with an aromatic. amin of the'benzene, or naphthalene, series a 4c-halogenated anthrapyridon compound which is substituted in 'position 2 and then sulfonating the compound so obtained.

3. The process of producing coloring matters of the anthracene series by condensing paratolui'din with 4-,chlor-2-methyl-anthragrees centigrade until a test portion shows but my invention is not confined to these exsulfonate this compound, dissolve one (1) pyridon and treating the product so obtained with a sulfonating agent. 4. As new articles of compounds of the anthracene series which can be obtained by condensing with an aromatic amin of the benzene, or naphthalene, series, a 4-halogenated anthrapyridon compound which is substituted in position 2, which compounds in the form of their sulfonio acids dye wool red shades and are solusolutions, are insoluble in alcohol, ether, benzene, and glacial acetic acid, and soluble in concentrated sulfuric acid yielding yellowish red to red solutions which are unaltered by the addition of boric'acid.

manufacture the fonic acid which dyes wool red shades, ields a violet-red solution in water, is insolu le in alcohol, ether, benzene, and glacial acetic" acid, andsoluble in concentrated sulfuric acid yielding a violet-red solution which is unaltered by' the addition of boric acid.

I In testimony whereof I have hereunto set my hand in the presence of two subscribing ble in water yielding yellow-red to red-violet witnesses.

FILIP KAOER.

Witnesses J. ALnc. LLOYD, Jos. H. LEUTEJ 

